#元组的定义以及基本操作
t1=()
print(t1)
t2=(1,2,3,4,5)
print(t2)
t3=(1,2,3,4,5,"123","45","python")
print(t3)
t4=(1,2,3,("1230","pthon"),"str")
print(t4)
t5=t3+t4
print(t5)
print(t2*3)
s=""
for x in t5:
    s+="{}-->".format(x)

print(s[:-3])

print(len(t5))
